Global Patent Index - EP 0895438 A3

EP 0895438 A3 20051012 - Circuit arrangement for a network termination unit

Title (en)

Circuit arrangement for a network termination unit

Title (de)

Schaltungsanordnung für eine Netzabschlusseinheit

Title (fr)

Circuit pour équipement de terminaison de réseau

Publication

EP 0895438 A3 20051012 (DE)

Application

EP 98112854 A 19980711

Priority

DE 19733250 A 19970801

Abstract (en)

[origin: EP0895438A2] The network interface allows useful signals to be transferred to and from the communications network and a network subscriber via a four-wire interface circuit with two identical electronic choke pairs (T1,T2;T4,T5), coupled via similar resistors (R2,R4;R5,R6) to the emitters of a symmetrical current supply inserted in the interface circuit. The supply circuit is protected from short-term overcurrents by a current limitation element (T3) and from long-term overcurrents via a cut-out device (T7,T8) with a time- controlled supply connection switch (T9) coupled to the bases of the transistors of the throttle pairs. T he required transmission level along the wires (1a,1b;2a,2b) is obtained by an active line driver (LT).

IPC 1-7

H04Q 11/04

IPC 8 full level

H04Q 11/04 (2006.01)

CPC (source: EP)

H04Q 11/0471 (2013.01); H04Q 2213/1308 (2013.01); H04Q 2213/13166 (2013.01); H04Q 2213/13194 (2013.01); H04Q 2213/13202 (2013.01); H04Q 2213/13209 (2013.01); H04Q 2213/13299 (2013.01); H04Q 2213/13302 (2013.01); H04Q 2213/13305 (2013.01); H04Q 2213/1332 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0895438 A2 19990203; EP 0895438 A3 20051012; EP 0895438 B1 20070613; AT E364978 T1 20070715; DE 19733250 A1 19990204; DE 59814026 D1 20070726

DOCDB simple family (application)

EP 98112854 A 19980711; AT 98112854 T 19980711; DE 19733250 A 19970801; DE 59814026 T 19980711